CalcVerse

Cloud Storage Cost Calculator

Object storage bills have three parts: GB-months stored, data transferred out (egress) and per-request charges. Enter your provider’s rates for each.

Also called: Object storage cost calculator · Blob storage cost calculator

  • Last updated
  • Formula tested against reference values

Your numbers

GB here means a decimal gigabyte (1,000,000,000 bytes); 1 GiB = 1,073,741,824 bytes. Use the same unit as your price list.

Leave blank if one price applies to all data.

Example price only. Enter the current rate from your provider’s price list.

Example price only. Enter the current rate from your provider’s price list.

Example price only. Enter the current rate from your provider’s price list.

Example price only. Enter the current rate from your provider’s price list.

Example price only. Enter the current rate from your provider’s price list.

Result

Monthly cost
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Calculating…

Storage
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Egress
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Requests
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Annual cost
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How to use this calculator

  1. Enter or choose average data stored.
  2. Enter or choose first price tier covers.
  3. Enter or choose price per GB-month (first tier).
  4. Enter or choose price per GB-month above the first tier.
  5. Enter or choose data transferred out per month.
  6. The monthly cost updates as you type. Use Copy result or Share to keep it.

Method

Storage = min(GB, Tier) × P1 + max(0, GB − Tier) × P2; Egress = max(0, Out − Free) × Egress price; Requests = Writes ÷ 1,000 × Pw + Reads ÷ 10,000 × Pr

GB
average GB stored over the month
Tier
GB covered by the first price
P1, P2
price per GB-month in each tier
Pw, Pr
request prices

Worked example

  1. Storage: 1,000 × 0.02 + 4,000 × 0.015 = 20 + 60 = 80.
  2. Egress: (200 − 100) × 0.09 = 9.
  3. Requests: 1,000 × 0.005 + 1,000 × 0.004 = 9. Total 98.

At these example rates, 5,000 GB with modest traffic costs about 98 a month.

What the result means

Storage is usually the steady part of the bill; egress and requests swing with traffic. If egress dominates, a CDN or a provider with cheaper or free egress may cost less overall.

Assumptions and limits

  • The amount stored is the average across the month (a GB-month is 1 GB kept for a whole month).
  • Tiers apply to the total stored, as on most graduated price lists.
  • Minimum storage durations, retrieval fees for cold tiers, replication and taxes are not included.
  • Some providers price per GiB while labelling it GB; check which your price list uses.

Questions

What is a GB-month?

One gigabyte stored for one month. 300 GB kept for 10 days of a 30-day month is about 100 GB-months.

Is transfer into the cloud charged?

Ingress is often free, but egress to the internet and sometimes between regions is charged. Check your provider.